We study joint marketing arrangements by competing firms who engage in price discrimination between consumers who patronize only one firm (single purchasing) and those who purchase from both competitors (bundle purchasers). Two types of joint marketing are considered. Firms either commit to a...

According to conventional wisdom, if a monopolist operates in two separate markets whose respective demand functions can be ordered by elasticity, he will charge more on the market with the less elastic demand. In this paper we debunk the widespread canard that this follows from the first order...